Answer:
C. a closed loop of wire moving at constant velocity in a nonuniform static magnetic field.
Explanation:
As we know by Faraday's law that rate of change in magnetic flux will induce EMF
so mathematically we can say that
so we will have
so EMF will be induced if the flux linked with the closed loop will change with time.
So here correct answer will be
C. a closed loop of wire moving at constant velocity in a nonuniform static magnetic field.
Conduction: If the classroom gets super cold, the body temperature of students might change.
Convection: The cool air in a classroom can cool off the hot breath of the students.
Answer:
Explanation:
N=Rotor Speed in Revolution per minute(rpm)
for P=4 and N=3600, f comes out to be 120 Hz.
So frequency of voltage produced is 120 Hz. But this is not practical. Generally 4-Pole generator has N=1500rpm(for 50 Hz) or 1800rpm for 60 Hz. Two pole generator can have N=3600rpm(f=60Hz).
The most practical situation is generator having N=3600Hz with 2 Poles.
Hope It will be helpful!!!
Answer:
Momentum, p = 5 kg-m/s
Explanation:
The magnitude of the momentum of an object is the product of its mass m and speed v i.e.
p = m v
Mass, m = 3 kg
Velocity, v = 1.5 m/s
So, momentum of this object is given by :
p = 4.5 kg-m/s
or
p = 5 kg-m/s
So, the magnitude of momentum is 5 kg-m/s. Hence, this is the required solution.
